PPA J1812-2546

SUSPECTED MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 12 22.759
δ = -25 46 11.475

Galactic coordinates
l = 5.7085°
b = -3.5725°

Suspected	2016^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	-
Outbursts	-

Identifiers

PPA J1812-2546	IRAS -	GSC2.4.2 S9S5109598	AAVSO 000-BKL-617
SIMBAD OGLE BLG-LPV-225654	Pan-STARRS 77072730948326469	SAO -	VSX 281970
GAIA DR3 4064741488356986368	SkyMapper -	WRAY -	GCVS V6206 Sgr
2MASS J18122276-2546114	HIP -	Hen -	BD -
WISE J181222.76-254611.2	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	-
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	273.0948^Ref	Parallax (mas)	0.065±0.063^Ref	Reddening E(B-V) (mag)	0.78±0.01^Ref ^{, Note}
Declination (°)	-25.7699^Ref	Distance (kpc)	6.57^Ref ^{, Note}, 7.50^Ref ^{, Note}
Galactic longitude (°)	5.7085^Ref	Proper motion in α (mas/yr)	-4.34±0.08^Ref
Galactic latitude (°)	-3.5725^Ref	Proper motion in δ (mas/yr)	-3.78±0.06^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	10.05^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	9.02^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.50^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.28^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.88^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.00^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	6.15^Ref	[O III] lines	-
V (mag)	18.74^Ref	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	15.20^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	18.42^Ref	IRAS 100μm (Jy)	-
G (mag)	14.95^Ref	AKARI S09 (Jy)	0.11^Ref
RP (mag)	13.43^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-	Size of giant’s orbit (AU)	-
Eccentricity	-	RV of giant (km/h)	-	Separation (AU)	-
Inclination (°)	-	Inferior conj. of giant (JD)	-	Mass function	-
Eclipses	-			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	-	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	S?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	199^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	Max = 2451352 + 199 x E^Ref

Hot component

Type/Spectral type	-	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	-	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Symbiotic star candidate in HASH Database of PNe (Parker et al., 2016). Suggested based on infrared colors. No spectra are available in the database. Additionally classified as a Mira variable (Huemmerich & Bernhard, 2012) and a long-period variable (Soszyński et al., 2013).

References

Huemmerich, S., Bernhard, K., 2012, OEJV, 149, 1, 2012OEJV..149....1H
Parker, Q. A., Bojičić, I. S., Frew, D. J., 2016, JPhCS, 728, 3, 032008, 2016JPhCS.728c2008P
Soszyński, I., Udalski, A., Szymański, M. K. et al., 2013, AcA, 63, 1, 21, 2013AcA....63...21S

Last updated: March 19, 2022